I do not think of any other configuration needed for call pickup on CME. You mentioned in your original post that you are using CME 12.0. can you try upgrading CME to latest version? If it still doesn't work then I would recommend opening a Cisco TAC case.

the upgrade of IOS of the CME to the version 16.09.03 resolved the issue of the call pickup described below:

""The call is picked up when I press pickup soft key then the number that is calling. But the problem is: automatically is activated "forward all" option (soft key on the screen). And if it is not disabled manually (by pressing Fwr Off) all the call are forwarded to the phone that picked up the first call.""

the upgrade of IOS of the CME to the version 16.09.03 resolved the issue of the call pickup described below:

""The call is picked up when I press pickup soft key then the number that is calling. But the problem is: automatically is activated "forward all" option (soft key on the screen). And if it is not disabled manually (by pressing Fwr Off) all the call are forwarded to the phone that picked up the first call.""

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